chore(deps): bump undici and wrangler in /packages/stats

Bumps [undici](https://github.com/nodejs/undici) to 7.28.0 and updates ancestor dependency [wrangler](https://github.com/cloudflare/workers-sdk/tree/HEAD/packages/wrangler). These dependencies need to be updated together.


Updates `undici` from 7.24.4 to 7.28.0
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v7.24.4...v7.28.0)

Updates `wrangler` from 4.78.0 to 4.103.0
- [Release notes](https://github.com/cloudflare/workers-sdk/releases)
- [Commits](https://github.com/cloudflare/workers-sdk/commits/wrangler@4.103.0/packages/wrangler)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 7.28.0
  dependency-type: indirect
- dependency-name: wrangler
  dependency-version: 4.103.0
  dependency-type: direct:development
...

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Author: dependabot[bot]